package com.zlc.sykks.utils;

import com.auth0.jwt.JWT;
import com.auth0.jwt.JWTCreator;
import com.auth0.jwt.algorithms.Algorithm;
import com.auth0.jwt.interfaces.DecodedJWT;

import java.util.Calendar;
import java.util.Map;

public class JWTUtils {

    public static final String SIGN = "zhaoliancheng";

    /*
    * 生成token
    * */
    public static String createJWT(Map<String,String> map){

        Calendar instance = Calendar.getInstance();
        //默认七天过期
        instance.add(Calendar.DATE,7);

        //创建jwt builder
        JWTCreator.Builder builder = JWT.create();

        //payload
        map.forEach((k,v)->{
            builder.withClaim(k,v);
        });

        //返回token
        String token = builder.withExpiresAt(instance.getTime())//设置过期时间
                .sign(Algorithm.HMAC256(SIGN));//设置签名
        return token;
    }
    /*
    * 验证合法性
    * */
    public static DecodedJWT verify(String token){
        return JWT.require(Algorithm.HMAC256(SIGN)).build().verify(token);
    }
}
